This site, mozilla.dev
brings together all that Mozilla has to offer developers, including what we’re working on in today’s Firefox browser, tomorrow’s emerging technologies, and the content, products, and services that we build explicitly for web designers and developers. This is where you can discover tech events that are organized or supported by Mozilla, find out how to get involved with the programs we offer, and learn more about participating in the communities we support. Here, you can connect with Mozilla Developer advocates and tech speakers and find video and presentations from around the world about your favorite topics and technologies. It’s also a home for resources specific to Mozilla and Firefox projects and products.
MDN Web Docs at developer.mozilla.org
is a comprehensive public resource providing education and reference material about web technologies. An ongoing documentation project staffed by Mozilla and supported by our partners and contributors around the world, MDN will always be maintained as an open public resource by and for developers.